Water or air feed side-inlet drill-bit.



' No. 801,480. PATENTED 001 10, 1905.

0.11. SHAW. WATER OR AIR FEEDSIDE INLET DRILL B APPLICATION FILED 00T.10,1904.

fiwamri Unrrrin ori ron.

CHARLES HENRY SHAN, OF DENVER, COLORADO ttlAl'i-LR OR Al? FEED SlDE=lNLET DRlLL ElT.

To ctZZ whom it may concern: 1

Be it known that I, CHARLES HENRY SHAW, a citizen of the United States of America, residing in the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Nater or Air Feed Side-Inlet Drill-Bits; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in rock-cutting drill-bits; and the object of my invention is to provide a side-inlet water and air feed rock-cutting drill-bit provided with an enlarged circular rock-cutting head which contains a circular row of rock-cutting lips and that is adapted to be used in rock-drilling engines to drill holes in either wet or talcky or dry rock. I attain this object by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a perspective view of a drill-bit embodying my invention. Fi Z'is a section of Fig. 1, and Fig. 3 is an end elevation of the rock-cutting head.

Similar numerals of reference refer to similar parts throughout the several views.

Referring to the drawings, the numeral 1 designates the shank of the drill-bit. 2 designates a collar that is formed integral with the shank at a short distance from the hamnier-striking end of the shank. The striking end 3 is formed into a square or hexagon or other polygonal shape. for preferably a short distance from its end, and the remainder of the distance from the hammer-striking end to the collar is preferably of round form. The rock-cutting end comprises an enlarged circular head portion 5, t e end or face of which is formed at substantially right angles to the axis of the drill-bit. Its outer periphery is larger in diameter than the to and lends into the shank. The shank is shank pbortion and tapers c'onver ingly back provided with an axial hole 6, that extends its collar crtion, and in the face of the head a circumfllrential row of Vsl1aped rock-cutting lips are formed which radiate from the peripheral edge of its axial a erture to the peripheral ed e of the head. hese rock-cut ting lips are p aced close together and I pref- Speoificaticsn of Letters ?atent.

Application filed October ;1904. Serial No. 227,889-

i'nto it from its rook-cutting end to opposite Patented Oct. 10, 1905.

erably use about fourteen in a drill-bit that will drill an inch-and-aneighth hole.

At the periphery of the head between each two lips a groove 7 is formed that extends along the tapering slope of the head a short distance, through which the rock-dust and cuttings work to the rear of the head. Transversely into the collar 2 at substantially right angles to the axial aperture in the drillbit I d'iill a hole 8, which intersects the axial aperture 6. The hole 8 forms a side inlet into the axial aperture of the drill-bit, and it is internally threaded. A flexible water or air conveying tube hose or conduit 9 is then connected at one end in any {suitable manner and by any suitable means to this threaded side inlet the opposite end of which is connected to a supply of water under presure or to a'supply of air under pressure. I preferably use a hose for conveyinn water or air to the drill-bit, and I preferably arrange and connect the hose to the threaded inlet in the following ma .ner: 'In the threaded inlet I screw a hardened-steel reducer 10, in the outer end of which I screw one end of a nipple 11, the opposite end of which is im serted in one end of a short iece of hose and is secured there by a clamplng band 12,, the ends of which are provided with a screwdriver-head screw 13, which extends through them and a nut 14, the clamping-band and its screw and nut being arran ed to clamp the hose tight to thenipple. In the opposite end ofthis short piece of hose I place the end of one half of a union or hose coupling and secure it to the hose by another clamping-band 12. Isecure by a clampingband 12 the end of the o .posite half of a union or hose coupling 17, w 'ch connects to the half.15, and the opposite end of the hose 16 leads to a source of water or air under pressure. I em loy the hardened reducers to save the three s in the inlet in the drill-bit, and I employ a short Then in the end of a hose 16- I piece of hose attached directly to the re- Y ducer, because it is elastic and pliablean'd yields under very rapid vibration of the drill- Y bit, and I couple the main length of hose to the short piece of hose, as it is necessary to uncouple and couple the long hose every time a drill-bit is changed. The reducer and the short piece of hose makes a very light weight between the drill-bit and the main length of hose.

My improved drill-bit is ada ted to heremovably clamped at its sha end to any tary motion, and it is particula '15 in dry rock a supply of airunder 1 4.0 portion and connecting with said I circular row of ei-shaped roc ecu type oirccli-drilling engine e'hici to partially rotate it or-to nnpart to cillating motion While it is drilling as it 1s not adapted to a full consecutiy so be used in the rock-drilling en in my Senal l lo. 225 147 filed September 19 1964.

7 7 1 1 l W hen drillin holes in Wetor talent rock. it

I0 stream of Water is kept flowing through the hose into the side inlet of the dr ll-hit and through its axial aperture and Washes the mud or sticky rock-cuttings out the hole as it is being drilled, and when d holes ssurc from a source of supply is l zept flowing through the hose into the side inlet of the drill-hit and through its axiel aperture and blows the rock-cuttings out the hole as it is is, being drilled.

The large number of rock-cutting lips l employ enables my drill-hit to cut and to out even and smooth holes and at the same time to Wear e long time, the drill-hit does 2 5 not become dull until all of *he cutting-lips are dull,

Having described my invention, What cPlaim as new, and desire to secure by Letters etent, is-

1. In a rock-cutting drill-hi the combination With a drill-hit comp *ing a shank portion having one end to operativel supported in a reel: drilling eh and having its opposite end provided i 1 3 5 circular row clinch-cutting lips, a Waeer its rock-cutting lips end to near i s o posite end and a threaded Water and air apen Way, or" a reducer threaded at one en to so (threaded 1nlet, a nipple secured to said air passage extending into said. dr'll-hit from 1 inl ture extending into the side of said. SilElJlk dimer and a hose connected at one end to said nipple and having its opposite end extend to a source of Water or air under pressure,

substantially as described.

2. In a rock-cutting drili eie, ashank por- 'tionprovided With a polygonal form at its hammer-striking end for a short distance from -;0 its end, a collar formed on said shank portion V nhodied application for a patent new pending,

head, substantially den rock-cu pr .i, a collar formed on saio slisnzi went so hainm sir-striking and, en enlar ed ell'filllill diverginglytapering head portion on said drill-shank having its 1 id shank, an axial. ap mtially through said drill-hit, C). ded inlet, circular row oi liens-peel alt-cutting lips formed in the face of said ad radiating from the periphery cl? said aperture to the periphery of said head groove n the peripheral surface heed 'hetwee each pair of rock-eutii lips, su stantially described.

in a rocl-z-cutting drill-hit, round porticr ed with hexagon sur face for short list-slice at and spending from its hammcnstrihing end. a ronn nor tier. adjacent to sci-1i polygonal surf coller encircling said shank and form vl. therewith,and posi tioned on the round i said shank at short .l portion, a threaded innling into said collar, an. la ged Ursula? outwardly-diverging taper id portion on said drill-snanli h ying i'i it an snial aptending from oe" cussing end to the threaded inlet circular row of ii-shaped rockl in the face of said head t e eriphery of said axial vare the perip iery' 0? said head. and a groove in the peripheial surface of saidheed hetween ea 1 pair of rock-cutting lips, suhstantially described 5. in a rc ting drill-hit, the comhina orovided with roclr-cut oer or air passage-Way exits roclo cutting lips and L. side-inlet aperture in the *ith passage-Way, of the reducer cores; to said threaded inlet, the nipple threaded at one end to said re duce'r, the short piece of hose connected to the opposite end of said is ple, a main length of hose connected at supply of wster or air nder pressure and conpled'at opposite end to said short oi-hnse, s5 lticlly descrihed. testimon, whereof afl ar my oi; in'presence of two asses.

' HENRY itnesses:

J n ts lace end formed suhseannally at angles to the cl said she: ertnre tl'niough (lIlll-bli;

shank con ecting .cd substantially at right angles one'end to a sh re 

